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I have a program that reads a binary data file in Unix and works just
fine, however when I tried it in Linux the read and unpack commands did
not give me the same answer. I am trying to simply read a short
integer. In Unix, the $nscan is around 20000, in linux it is a huge
number or even negative. I belive that the problem has to do with
bigendian vs littleendian, but when I try different combinations of
unpack options nothing works.
Thanks
tex

open(F, "$filein") or die "Unable to open file";
binmode(F);
read(F,$packscans, 4);
$nscan = unpack("i*",$packscans);

Tex wrote:
> I have a program that reads a binary data file in Unix and works just
> fine, however when I tried it in Linux the read and unpack commands did
> not give me the same answer. I am trying to simply read a short
> integer. In Unix, the $nscan is around 20000, in linux it is a huge
> number or even negative. I belive that the problem has to do with
> bigendian vs littleendian, but when I try different combinations of
> unpack options nothing works.
> Thanks
> tex
>
> open(F, "$filein") or die "Unable to open file";
> binmode(F);
> read(F,$packscans, 4);
> $nscan = unpack("i*",$packscans);

Can you post the output of 'dd if=<file> bs=4 count=1 | OD -TXc'?
WRT endianness: what is the processor of the Unix box and what is Linux
running on?

--
Josef Möllers (Pinguinpfleger bei FSC)
If failure had no penalty success would not be a prize
-- T. Pratchett